Portable scaffold structure



oct. 24, 1944. P. A. WYEN 2,360,999

PORTABLE SCAFFOLD STRUCTURE Filed April 8, 1945 2 Sheets-Sheet l F1E l 2Sheets-Sheet 2 v P. A. WYEN Filed April 8, 1945 PORTABL SCAFFOLDSTRUCTURE P 1 E; E.-

Idescribe one of said units in detail.

Patented Oct. 24, 1944 UNITED STATES PATENT yOFF-ICE PORTABLE soAFroLDSTRUCTURE Peter A. Wyen, Minster, Ohio Application April s, 1949, serialNo. 492,294' 7 claims. (o1. 994-9) The invention relates generally toscaifolds and primarily seeks to provide a novel form of scalold whichcan be moved about from place to place with great facility, and whichcan be readily'adjusted'as to length and height and collapsed forconvenient storage or shipment.

' An object of the invention is to provide a scaflfold structure of thecharacter stated including a demountable, roller supported cradle equip-4ment 'which facilitates movement about of the sca'iold structure, andVsuitable jack equipments by which the weight of the scaffolding can beeased off said rollers so as to x the'scaiolding in a selected positionfor use.

Another lobject of the invention is to provide in a scaffold structureof Ithe character stated,

novel collapsible base structure.

Another object of the invention is to provide l a scaffolding structureof the character stated the detailed description, the appended claimsand the several views illustrated in the accompany- 'ing drawings.

In the drawings: 'Figure 1 is a sidev elevation illustrating the inVention. Figure 2 is an end elevation. Figure 3 is a detail horizontalsectional View taken on lthe line 3'-3 on Figure 1. "Figure 4is a detailhorizontal sectional view `taken on the line 4-4 on Figure 2.

` The improved scaffolding structure comprising the invention includestwo identical end units which are connected by adjustable distancepieces 'and adjustable braces in the formation of complete scaoldingstructure, and it will suflice to Each end unit comprises'a main upperyin- 've'rted' U-shaped trestle piece 5 and a lower -U-shaped trestlepiece 6, the two pieces 5 and 6 'being 'connected by suitable uprights1.

the legs 9 they can be folded flat-wise against the lower trestle piece6 for convenience in storing or shipping the structure. When thescaffolding is in use the sets of legs 9 are normally held in theoperative, `spread relationillustrated in Figure 1 by collapsible bracelinks II which are centrally pivoted together as at I2 and individuallypivoted at their outer ends to the respective legs as at I3.

When locked in their operative, spread condition illustrated in Figure1, the legs of each set are mounted. in a cradle Ill, the upstanding endbars of which are clamped to the lower ends of the spread legs byclampscrews. Each cradle I4 issupported on rollers I'I to facilitate movingof the scaffolding about vfrom place to place, vand each cradle isprovided with one or more jack screws I8 which may be manipulated toengage the ground and ease ,off the weight supported on the cradle so asto secure the scaffolding against free movement when it is placedl inthe desired position of use.

A standard I9 projects upwardly from each end of each trestle equipment5, 6 and serves as a mounting or support for an upwardly pro.-l

jecting, aligned standard 29 havingasocket sleeve 2| secured toits lowerend for removably telescoping over the upper extremity of the respectivestandard I9 in the manner clearly illustrated in Figures 1 and 2.r Eachextension standard 20, 2I is secured in position on the respectivemounting standard I9 by a clamp screw 22. l

Additional upward extension or standard pieces 23 may be provided, onethereof being adapted to align with and extend upwardly from. eachstandard piece 20, the additional standard pieces also being providedwith socket sleeve extensions 24 for receiving the upper ends of thestandard pieces 2| and being secured thereon by clamp ,screws 25.

The socket sleeves 2|. of each unit may also be provided with socketsleeve extensions 26 for removably receiving the downwardly bent ends 2lof a truss cross arm or platform support 28 in the manner clearlyillustrated in Figure 2 of the drawings. y

The standard pieces 23 of eacli unit also may be carried by a trusscross arm or platform support 29 in the manner clearly illustrated inFigure 2.

It will be observed by referenceto Figure 1 of the drawings that one ormore of the upper standard pieces 23 maybe employed to support one ormore swingably mounted support arms 30,

at I0. By reason of the pivotal connection of each said support armequipment including a ends of the brace pieces are attached to bosses,-

42 provided on the standard pieces 20. e

In the use of the scaffolding equipment the supporting legs 9 of therespective units are spread in the manner clearly illustrated in Fig'-ure 1 and secured on the cradles I9.A The proper number of uprights orstandards 20, 23 are assembled in the manner illustrated in Figures 1and 2, and if one or more of the swingable lift supporting arms 30 is tobe used, suitable mounting thereof is effected on` theA selected upperstandard or standards 23. l The'units may be conveniently moved about ontheir roller .sup-

`ports to bring said units into proper parallel spaced relation and thenthe transverse distance pieces 34, 3'! and the lbracevpieces 40 aresuitably mounted in the manner clearly illustrated in Figure 1.Thedesiredplatform equipment can then be placed on the supports 2B and29 and the completely assembled scaffolding structure can beconveniently moved into the position lin which it is to be used. Afterthe equipment is thus placed the jack screws IB can be manipulated toease the rollers 21 01T the floor to a suflicient degree to transfer theload onto the jack screws sothat the scaifolding equipment will besecurely held in place against free rolling movement. v

It is of course to be understood thatl the details of structure and thearrangement ofparts 4may be variously changed and modified withoutdeparting from the spirit' and scope of the invention. Y

I claim:

ers to the oor to secure the unit against free rolling movement.

5. In a oor supported scaiiolding structure, two parallel spaced rigidbase units, each said unit comprising a transverse base unit, a standardupstanding from each end of the base unit, platform supporting meansconnected across between said standards, a spreadable leg set for'supporting each end of each base unit, means pivotally connecting thelegs of each set to the respective base unit so that they can be spreadapart into operative supporting relation or co1- lapsed into closeparallel inactive relation, and link means for holding the legsv of eachset in operative spread relation and foldable to permit collapsing ofthe legs, adjustable distance pieces extending across between standardsof thespaced units and connecting the spaced units,

1. A scaffoldv structure i unit comprising a supporting means connectedacross between said standards, a spreadablev leg set for supporting eachend of .the base. unit, means `pivotally connecting the legs of each setto thebase unit so that they can be spread apart into operativesupporting relation or collapsed into close parallel inactive relation,and link means for holding the legs in operative spread relation andfoldable to permit collapsing of the legs.

2. A scaffold structure unit as dened in claim 1 in which each saidstandard includes a plurality of telescopically mounted -unit sections.

3. A scaffold structure unit as defined in claim 1 in whichI each'set ofv supporting legs when spread are v'secured 'in a roller supportedcradle for facilitating movement about of thescaffold structure. u l

4. A scaiold'structure unit as defined in claim Al .in which each set ofsupporting legs when' ing movement.

and adjustable brace means connecd to the distance pieces and thestandards for supporting said distance pieces intermediately of the endsthereof.

6. In a floor supported scaffolding structure, two parallel spaced baseunits, each said unit comprising a transverse base unit, a standardupstanding from each end of the base unit, platform supporting meansconnected across between said standards, a spreadable leg set forsupporting each end of the base unit, means pivotally connecting thelegs of each set to the base unit ends thereof, the sets of supportinglegs of each unit each being secured in a roller supported cradle forfacilitating movement about of the scaffolding structure.

7.`In a floor supported scaffolding structure, two parallel spaced baseunits, each said unit comprising a transverse base unit, a standardupstanding from each end of the base unit, platform supporting meansconnected across between said standards, a spreadable .leg set forsupport ing each' end of the base unit, means pivotally connecting thelegs of each set to the base unit so that they can be spread apart intooperative supporting relation or collapsed into close para1 lel inactiverelation, and link means for holding the legs in operative spreadrelation and fold-` able to permit collapsing of the legs, adjustablevdistance pieces extending across Vbetween stand- PETER A. WYEN,

